RE: Got a used Warhead Evo. Need some tips?
Tear the engine down and clean it out. Clean all the parts off and look at the piston and sleeve for scoring. When you put he engine back together use after run on the crank and piston. Make note of the oil hole on the crank so when you put it back together so that the piston goes back in the same way. Look on youtube and there is a guy showing how to take apart a nitro engine. One way to check the piston and sleeve is to turn the engine over and it should get hard to turn at the top when it gets to TDC and then you will feel the engine snap back once the piston starts going down. Do all this with the glow plug in.